I am in the process of repainting my deck. I'd like to have a protective layer (like clearcoat on a car) that will allow easier cleanup, and would help to pretect the new paint. Is polyurethane appropriate for the job?
I don't ever like film finishes (whether paint or poly or varnishes) for horizontal exterior surfaces. Water and sun will win. Then you must remove chipped paint/finish before renewing
The use of penetrating transparent or semi-opaque exterior rated stains, will breath and last longer. Overcoats can be made after washing and drying the surface.